First. Similarly to what happened with Chapter 11 Epilogue, the previous version (0.12.2.2) didn't switch to the newly released 0.12.3 (aka Chapter 12 part 2).

Amongst other improvements, this version will fixed this major issue. If you're playing normally, the switch happens automatically. If you're at the end of chapter screen, a third button appears.

Second. I'm leaving on holidays in few days. I plan on updating the new content before I do and updated the rest when I come back.